Black Envelope Club’s Hotel Vesper mystery

Field notes

The project structures each mystery as a digital case file: players review statements, logs, images, and records, then name the planner and explain the method. Hotel Vesper is listed as a 45–75-minute investigation for one to four players, while the separate 23:17 test takes about five minutes and requires no account. Two additional cases—Nocturne Express and Meridian Radio—are identified as in production rather than available investigations.